<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style>
        #big {
            color: red;
        }
    </style>
</head>

<body>
    <div id="big">熊大</div>
    <div>熊二</div>
    <div>光头强</div>
</body>

</html>